package models

import (
	"errors"
	"fmt"
	"reflect"
	"strings"
	"sync"
	"time"

	"github.com/astaxie/beego"
	"github.com/astaxie/beego/orm"
)

type Parameter struct {
	Id                 int     `orm:"auto"`
	Syspump            float32 // 系统抽水值
	Patternwin0        int     // 猜大小吐分胜率
	Patternwin1        int     // 猜大小吃分胜率
	Comparesection     float64 // 奖池阀值
	SpecialChance      float32 // 特殊奖励概率
	ThresholdParameter float32 // 阀值参数
	BetLimit           int     // 下注限额
	GameId             int
}

var (
	SystemParamenter     Parameter
	SystemParamenterSync sync.RWMutex
)

func (t *Parameter) TableName() string {
	return "parameter"
}

func init() {
	orm.RegisterModel(new(Parameter))

	go func() {
		time.Sleep(time.Second / 2)
		updateSysParameter()
	}()
}

// 把数据库中配置读取到内存中
func updateSysParameter() {
	SystemParamenterSync.Lock()
	defer SystemParamenterSync.Unlock()

	parameter, err := GetParameterById(1)
	if err != nil {
		beego.Error("数据库中缺少 Parameter 数据！！！添加默认参数")
		SystemParamenter.BetLimit = 99
		SystemParamenter.Syspump = 10
		SystemParamenter.Patternwin0 = 55
		SystemParamenter.Patternwin1 = 45
		SystemParamenter.Comparesection = 10000
		SystemParamenter.SpecialChance = 10
		SystemParamenter.ThresholdParameter = 0.5
		SystemParamenter.GameId = 1
		id, err := AddParameter(&SystemParamenter)
		beego.Info(id, err)
		beego.Info("系统参数：", SystemParamenter)
	} else {
		SystemParamenter = *parameter
		beego.Info("系统参数：", SystemParamenter)
	}
}

// AddParameter insert a new Parameter into database and returns
// last inserted Id on success.
func AddParameter(m *Parameter) (id int64, err error) {
	o := orm.NewOrm()
	id, err = o.Insert(m)
	return
}

// GetParameterById retrieves Parameter by Id. Returns error if
// Id doesn't exist
func GetParameterById(id int) (v *Parameter, err error) {
	o := orm.NewOrm()
	v = &Parameter{Id: id}
	if err = o.Read(v); err == nil {
		return v, nil
	}
	return nil, err
}

// GetAllParameter retrieves all Parameter matches certain condition. Returns empty list if
// no records exist
func GetAllParameter(query map[string]string, fields []string, sortby []string, order []string,
	offset int64, limit int64) (ml []interface{}, err error) {
	o := orm.NewOrm()
	qs := o.QueryTable(new(Parameter))
	// query k=v
	for k, v := range query {
		// rewrite dot-notation to Object__Attribute
		k = strings.Replace(k, ".", "__", -1)
		qs = qs.Filter(k, v)
	}
	// order by:
	var sortFields []string
	if len(sortby) != 0 {
		if len(sortby) == len(order) {
			// 1) for each sort field, there is an associated order
			for i, v := range sortby {
				orderby := ""
				if order[i] == "desc" {
					orderby = "-" + v
				} else if order[i] == "asc" {
					orderby = v
				} else {
					return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
				}
				sortFields = append(sortFields, orderby)
			}
			qs = qs.OrderBy(sortFields...)
		} else if len(sortby) != len(order) && len(order) == 1 {
			// 2) there is exactly one order, all the sorted fields will be sorted by this order
			for _, v := range sortby {
				orderby := ""
				if order[0] == "desc" {
					orderby = "-" + v
				} else if order[0] == "asc" {
					orderby = v
				} else {
					return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
				}
				sortFields = append(sortFields, orderby)
			}
		} else if len(sortby) != len(order) && len(order) != 1 {
			return nil, errors.New("Error: 'sortby', 'order' sizes mismatch or 'order' size is not 1")
		}
	} else {
		if len(order) != 0 {
			return nil, errors.New("Error: unused 'order' fields")
		}
	}

	var l []Parameter
	qs = qs.OrderBy(sortFields...)
	if _, err = qs.Limit(limit, offset).All(&l, fields...); err == nil {
		if len(fields) == 0 {
			for _, v := range l {
				ml = append(ml, v)
			}
		} else {
			// trim unused fields
			for _, v := range l {
				m := make(map[string]interface{})
				val := reflect.ValueOf(v)
				for _, fname := range fields {
					m[fname] = val.FieldByName(fname).Interface()
				}
				ml = append(ml, m)
			}
		}
		return ml, nil
	}
	return nil, err
}

// UpdateParameter updates Parameter by Id and returns error if
// the record to be updated doesn't exist
func UpdateParameterById(m *Parameter) (err error) {
	o := orm.NewOrm()
	v := Parameter{Id: m.Id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Update(m); err == nil {
			updateSysParameter()
			fmt.Println("Number of records updated in database:", num)
		}
	}
	return
}

// DeleteParameter deletes Parameter by Id and returns error if
// the record to be deleted doesn't exist
func DeleteParameter(id int) (err error) {
	o := orm.NewOrm()
	v := Parameter{Id: id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Delete(&Parameter{Id: id}); err == nil {
			fmt.Println("Number of records deleted in database:", num)
		}
	}
	return
}
